铜模吸铸法制备Fe-Nd-Al-B-Dy合金的结构和磁性能  

Structure and magnetic properties of Fe-Nd-Al-B-Dy alloys by suction casting

作　　者：白琴[1] 满华[1] 唐永军[1] 郝彦斐[1] 徐晖[1] 夏爽[1] 胡业旻[1] 

机构地区：[1]上海大学材料研究所,上海200072

出　　处：《中国有色金属学报》2011年第5期1118-1122,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51001066);上海市重点学科建设项目(S30107)

摘　　要：为了进一步改善Fe-Nd-Al-B非晶合金的非晶形成能力和磁性能,研究添加Dy元素对此体系合金的显微结构、磁性能以及晶化行为的影响。利用铜模吸铸法制备厚度为1mm的片状(Fe0.51Nd0.35Al0.10B0.04)100-xDyx(x=0,1,3,6)合金。采用示差扫描量热法(DSC),振动样品磁强计(VSM)和X射线衍射仪(XRD)研究Dy对该系列合金非晶形成能力、磁性能和晶化行为的影响。结果表明,添加少量Dy元素使得合金Fe-Nd-Al-B-Dy的磁性能各项指标大幅度提高,得到较好的硬磁性。然而,当进一步提高Dy含量到6%时,合金呈现顺磁性。Fe-Nd-Al-B-Dy系合金晶化后,磁性能会发生很大转变,其中具有较好硬磁性的(Fe0.51Nd0.35Al0.10B0.04)99Dy1合金在完全晶化后呈现为顺磁性。In order to improve the glass-forming ability and magnetic properties of the Fe-Nd-Al-B alloy,the effect of Dy addition on the microstructure,magnetic properties and crystallization behavior of the Fe-Nd-Al-B alloy were investigated.The（Fe0.51Nd0.35Al0.10B0.04）100-xDyx（x=0,1,3,6） alloy plate with thickness of 1mm were prepared by suction casting into the copper mold.The glass-forming ability,magnetic properties and thermal stability of the Fe-Nd-Al-B-Dy bulk alloys were investigated by differential scanning calorimetry（DSC）,vibrating sample magnetometer（VSM） and X-ray diffraction（XRD）.The results show that the little addition of Dy can effectively enhance the magnetic property of the alloy and the alloy shows hard magnetic property.However,the alloy with 6% addition of Dy shows paramagnetic property.The magnetic properties of the alloys are greatly changed after crystallization.The（Fe0.51Nd0.35Al0.10B0.04）99Dy1 alloy,which shows hard magnetic property as the suction casting sample,shows paramagnetic property after crystallization.

关 键 词：大块非晶合金 非晶形成能力 磁性 晶化行为 

分 类 号：TG139[一般工业技术—材料科学与工程] TG115.27[金属学及工艺—合金]